ABAP Select data from SAP table WRFMATVALUES into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WRFMATVALUES table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to WRFMATVALUES. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the WRFMATVALUES table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_WRFMATVALUES TYPE STANDARD TABLE OF WRFMATVALUES,
      WA_WRFMATVALUES TYPE WRFMATVALUES,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <WRFMATVALUES> TYPE WRFMATVALUES.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WRFMATVALUES.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WRFMATVALUES
  INTO TABLE IT_WRFMATVALUES.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRFMATVALUES
*  INTO TABLE @DATA(IT_WRFMATVALUES2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_WRFMATVALUES INDEX 1 INTO DATA(WA_WRFMATVALUES2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WRFMATVALUES ASSIGNING <WRFMATVALUES>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRFMATVALUES>-MATNR = 1.
<WRFMATVALUES>-VKORG = 1.
<WRFMATVALUES>-VTWEG = 1.
<WRFMATVALUES>-PLTYP = 1.
<WRFMATVALUES>-INFNR = 1.

ENDLOOP.

LOOP AT IT_WRFMATVALUES INTO WA_WRFMATVALUES.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRFMATVALUES-EKORG, sy-vline,
  WA_WRFMATVALUES-LIFNR, sy-vline,
  WA_WRFMATVALUES-ESOKZ, sy-vline,
  WA_WRFMATVALUES-WERKS, sy-vline,
  WA_WRFMATVALUES-LGORT, sy-vline,
  WA_WRFMATVALUES-LGNUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRFMATVALUES you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_WRFMATVALUES TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_WRFMATVALUES INTO WA_WRFMATVALUES.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WRFMATVALUES-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRFMATVALUES-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WRFMATVALUES-INFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRFMATVALUES-INFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WRFMATVALUES-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRFMATVALUES-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WRFMATVALUES-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRFMATVALUES-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_WRFMATVALUES-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRFMATVALUES-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WRFMATVALUES-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRFMATVALUES-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ASORT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WRFMATVALUES-ASORT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRFMATVALUES-ASORT.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_WRFMATVALUES_STR, 
MATNR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
PLTYP TYPE STRING,
INFNR TYPE STRING,
EKORG TYPE STRING,
LIFNR TYPE STRING,
ESOKZ TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
MEINH TYPE STRING,
SPRAS TYPE STRING,
KUNNR TYPE STRING,
ASORT TYPE STRING,
TBNAM TYPE STRING,
STRUCTURE TYPE STRING,
FIELDNAME TYPE STRING,
SEGMENT_NO TYPE STRING,
FIELDVALUE TYPE STRING,
INPUT_CONTROL TYPE STRING,
FIELDVALUE_NEW TYPE STRING,
FUNCTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRFMATVALUES_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_WRFMATVALUES_STR-MATNR sy-vline 
WA_WRFMATVALUES_STR-VKORG sy-vline 
WA_WRFMATVALUES_STR-VTWEG sy-vline 
WA_WRFMATVALUES_STR-PLTYP sy-vline 
WA_WRFMATVALUES_STR-INFNR sy-vline 
WA_WRFMATVALUES_STR-EKORG sy-vline 
WA_WRFMATVALUES_STR-LIFNR sy-vline 
WA_WRFMATVALUES_STR-ESOKZ sy-vline 
WA_WRFMATVALUES_STR-WERKS sy-vline 
WA_WRFMATVALUES_STR-LGORT sy-vline 
WA_WRFMATVALUES_STR-LGNUM sy-vline 
WA_WRFMATVALUES_STR-LGTYP sy-vline 
WA_WRFMATVALUES_STR-BWKEY sy-vline 
WA_WRFMATVALUES_STR-BWTAR sy-vline 
WA_WRFMATVALUES_STR-MEINH sy-vline 
WA_WRFMATVALUES_STR-SPRAS sy-vline 
WA_WRFMATVALUES_STR-KUNNR sy-vline 
WA_WRFMATVALUES_STR-ASORT sy-vline 
WA_WRFMATVALUES_STR-TBNAM sy-vline 
WA_WRFMATVALUES_STR-STRUCTURE sy-vline 
WA_WRFMATVALUES_STR-FIELDNAME sy-vline 
WA_WRFMATVALUES_STR-SEGMENT_NO sy-vline 
WA_WRFMATVALUES_STR-FIELDVALUE sy-vline 
WA_WRFMATVALUES_STR-INPUT_CONTROL sy-vline 
WA_WRFMATVALUES_STR-FIELDVALUE_NEW sy-vline 
WA_WRFMATVALUES_STR-FUNCTION sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.